/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {defineComponent, h, unref, renderSlot} from 'vue'
import {useFormItem} from 'naive-ui/es/_mixins'
import {
    NFormItemGi,
    NSpace,
    NButton,
    NGrid,
    NGridItem,
    NInput
} from 'naive-ui'
import {isFunction} from 'lodash'
import {PlusOutlined, DeleteOutlined} from '@vicons/antd'
import type {IJsonItem, FormItemRule} from '../types'

const MultiInput = defineComponent({
    name: 'MultiInput',
    emits: ['add'],
    setup(props, ctx) {
        const formItem = useFormItem({})
        const onAdd = () => void ctx.emit('add')

        return {onAdd, disabled: formItem.mergedDisabledRef}
    },
    render() {
        const {disabled, $slots, onAdd} = this

        return h(
            NSpace,
            {vertical: true, style: {width: '100%'}},
            {
                default: () => {
                    return [
                        renderSlot($slots, 'default', {disabled}),
                        h(
                            NButton,
                            {
                                circle: true,
                                size: 'small',
                                type: 'info',
                                disabled,
                                onClick: onAdd
                            },
                            {
                                icon: () => h(PlusOutlined)
                            }
                        )
                    ]
                }
            }
        )
    }
})

export function renderMultiInput(
    item: IJsonItem,
    fields: { [field: string]: any },
    unused: { [key: string]: FormItemRule }[]
) {
    const {field} = isFunction(item) ? item() : item
    // the fields is the data of the task definition.
    // the item is the options of this component in the form.

    const getChild = (value: string, i: number) => {
        const mergedItem = isFunction(item) ? item() : item
        return h(
            NFormItemGi,
            {
                showLabel: false,
                path: `${mergedItem.field}[${i}]`,
                span: unref(mergedItem.span)
            },
            () =>
                h(NInput, {
                    ...mergedItem.props,
                    value: value,
                    onUpdateValue: (value: string) =>
                        void (fields[mergedItem.field][i] = value)
                })
        )
    }

    //initialize the component by using data
    const getChildren = ({disabled}: { disabled: boolean }) => {
        return fields[field].map((value: string, i: number) => {
            return h(NGrid, {xGap: 10}, () => [
                getChild(value, i),
                h(
                    NGridItem,
                    {
                        span: 2
                    },
                    () =>
                        h(
                            NButton,
                            {
                                circle: true,
                                type: 'error',
                                size: 'small',
                                disabled,
                                onClick: () => {
                                    fields[field].splice(i, 1)
                                }
                            },
                            {
                                icon: () => h(DeleteOutlined)
                            }
                        )
                )
            ])
        })
    }

    return h(
        MultiInput,
        {
            name: field,
            onAdd: () => {
                fields[field].push('')
            }
        },
        {
            default: getChildren
        }
    )
}
